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G. E. ADAMS.

GLASP` No. 489,891. Patented Jan. l0, 1893.

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GEORGE E. ADAMS, OF PROVIDENCE, RHODE ISLAND.

CLASP.

SPECIFICATION forming part of Letters Patent No. 489,891, dated January10, 1893.

Application tiled August 9, 1892.

To a/ZZ whom t may concern:

Be it known that I, GEORGE E. ADAMS, of the city of Providence, in thecounty of Providence and State of Rhode Island, have invented certainnew and useful Improvements in Clasps; and l hereby declare that thefollowing is a full, clear, and exact description of the same, referencebeing had to the accompanying drawings, forming part of thisspecification.

This invention has reference to improvements in spring-clasps forsecuring the parts of an article together, or for securing separatearticles together.

The object of the invention is to produce a cap, or case,for a two-partclasp, which will be extremely tlat while being adapted to be firmlysecured to the material.

The further objectof the invent-ion is to produce a spring-stud whichwill be adapted to engage the inner portion of the cap to hold the twoparts of the clasp together against any Ordinary side strain.

The invention consists in the peculiar construction of the various partsforming the cap and the means for securing the same to the material,together with the novel combination and arrangement of these parts.

The invention further consists in the peculiar features of constructionand the novel combination of the parts forming the springstud and themeans for securing the same to the material,as will hereinafterbe moreclearly described and pointed out in the claims.

Figure l represents a cross-sectional view of the parts of which the capis composed. Fig. 2 represents a similar view ot' the parts assembled inplace and secured around a perforation in the material. Fig. 3represents a cross-sectional View of the spring-studs secured to a pieceof material. Fig. i representing a similar View of a modified form ofthe stud. Fig. 5 represents a view of the cap showing the perforatedshell. Fig. 6 is a top plan View of the split ring removed from itsholder.

Similar numbers and letters of reference designate corresponding partsthroughout.

In the drawings 5 indicates a thin lmetalshell having an annular-rim 6bent up therefrom 5 within this shell is placed the conicalengaging-ring 7 having the inwardly-curved Serial No. 442,554. (Nomodel.)

edge 8 and the outwardly-extending flange 9, and resting on this ange 9is the outwardlyextending flange 10 of the atiXing-riml1,the rim 6 ofthe shell 5 being turned inward over the edge of the fiange to securethe same and the ring 7 within the shell. When the cap is to be securedto a piece of material a perforation is first made of the size of therim Il, this rim is then inserted in the perforation and aslightly-convexbearing-riug 12 is placed over the same, the edges of therim l1 are then turned down over the bearing-ring, as is shown in Fig. 2of the drawings, rmly securing the cap to the material. It is evidentvthat the thickness of this cap need only exceed the thickness of thespring-stud by the space occupied by the bottom of the shell 5 and'thismay be reduced, if desired, by perforating the center of the shell 5 toallow the central portion of the stud to pass through the same, asisshown in Fig. 5 ofthe drawings.

The clamping-stud is formed of a split ring 13 made of round spring-wirethe ends of which are slightly separated as shown in Fig. G to allowofthe slight contraction thereof; this ring 13 may be secured to thematerial A in a variety of ways to allow of its slight eXpansion andcontraction,-I prefer, however, to use a headed stud 14 having a roundedhead to direct the movement of the edge 8 of the engaging-ring 7 towardthe circumference of 4the ring 13 the rounded outer surface of which isengaged by the edge 8. The shank of the stud 14C is contracted to form ashoulder against which the bearing-ring 15 rests, the material A beingheld between this ring and that marked 16 over the back of which the endof the stud-shank is riveted. The ring 13 may, however, be held in asetting similar to that shown in Fig. 4 of the drawings and having meansfor securing the same to the material.

Having thus described my invention, I claim as new and desire to secureby Letters Patentz- 1. In a clasp cap or case for cooperating with aspring stud, the combination with the engaging ring 7 having the edge 8forming the opening to the `cap or case and having the ange 9, ot` theouter shell having the annular flange underlying the fabric or materialand embracing the flange of the engaging ring and the atiixing rimhaving a flange con- IOU fined by the ange of the outer shell, and withits upper edge turned outward over the fabric or material atapproximately the level of the edge 8 of the engaging ring, whereby acap of approximately the thickness of the fabric or material is providedsubstantially as described.

2. In a clasp, in combination, the shell 5 having the rim 6 theengaging-ring 7 having the ange 9 located Within the shell, and theafxing-rim ll having the flange l0 resting 0n the flange 9, the rim 6being turned inward over the flange 10, as and for the purposedescribed.

3. In a clasp, the combination of a stud formed of a contractible splitring, a setting for holding said ring, and a cap or case adapted toinclose said ring and bear against its exterior surface; substantiallyas described.

4. In a clasp, the combination of a stud formed of a contractible splitring, a setting passing through the ring for holding the same, and anengaging device having an oritice of smaller diameter than the diameterof the split ring When expanded; substantially as described.

In Witness whereof I have hereunto set my hand.

GEORGE E. ADAMS. Witnesses:

HENRY J. MILLER, M. F. BLIGH.

